Hi GDN

Looked at your link, "SRS - Kenko 1.5x TC Clicky", the Tamron looks like the same item.

Thanks

Tony

Hello again

What about the Tamron 1.4 X Pz-AF teleconverter for Pentax? This is on Ebay as well.

Thanks

Thanks Stefan

I guess I was over complicating the idea I had. At any rate, I think I will opt to purchase a Kenko 1.5x TC. I've seen some on Ebay that are within the price range I was looking for.

As for magnification ratios with a TC I would probably max out the lense anyways. 300mm x 1.5 seems a pretty good compromise at f8.0 or so. Still would take nice shots on bright days.

How often can you get within 150 or so yards to a Hawk or Eagle anyways.

I appreciate the information

Thanks

Tony

Hi Stefan

Thanks for the reply and the welcome. I guess with a 1.5 TC I would sacrifice some aperature/light but, if I stayed around 75% of the 300mm, (say 200-250mm and use the TC I would sacrifice some light but not as significant as if I used all my magnification.

Also, on the DL if I used Aperature priority vs: Shutter Priority and use the -1EV setting, this may help with the overall image quality, ISO speed vs: aperature.

What is your thoughts on this logic?

Thanks

Tony

Hello everyone

Reading all the replies in regard to the 1.5x, 1.7x, 2x teleconverters; i'm sort of deciding against purchasing one. I take alot of Birding / action pictures, using my Pentax ISTDL and Pentax-DA 55-300 f4-5.8 lense, and find the lense fishes around for focus when zoomed to the MAX 300mm foacl length.

With a 1.5 or 2x teleconverter I can see it being extremely difficult to maintain a quick and accurate focus, especialy when action can be swift and not too forgiving. I cannot afford a expensive f2-f4 lense as this is well beyond my means, so I'm trying to decide how to get more magnification without sacrificing clarity, grain(pixels), or image quality.

Can anyone recommend a specific teleconverter that may not reduce the aperature too much at 50-100% of magnification. If need be I can stay within a 400-500mm magnification.

Thanks